Caption not working

Hello,

I don’t know exactly when it happend but about the time when I upgraded WP, captions started not to work anymore.

Captions in HTML view look like this, caption text in preview is working:

[caption id="attachment_1091" align="alignleft" width="800" caption="Der Drago Milenario in Icod de los Vinos: ein tausend Jahre alter Drachenbaumnnn."]<a href="http://backpackr.de/wp-content/uploads/2012/04/DSCN0147.jpg"><img class="size-full wp-image-1091" title="Drago Milenario" src="http://backpackr.de/wp-content/uploads/2012/04/DSCN0147.jpg" alt="Drago Milenario" width="800" height="600" /></a>[/caption]

Result on Page, without div wrap:

<a href="http://backpackr.de/wp-content/uploads/2012/04/DSCN0147.jpg"><img class="size-full wp-image-1091" title="Drago Milenario" src="http://backpackr.de/wp-content/uploads/2012/04/DSCN0147.jpg" alt="Drago Milenario" width="800" height="600"></a>

I already reinstalled WordPress, deactivated all plugins, renamed the plugin directory, switched to standard theme… Nothing worked out…

Any ideas?

Thanks a lot